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Activities and Novel Applications of Secondary Metabolite Coumarins Planta Daninha
HUSSAIN,M.I.; QAMAR ABBAS,S.; REIGOSA,M.J..
ABSTRACT: This review covers biological activity of secondary metabolites, coumarin and their derivatives on different organisms (pests, pathogens, weeds), as well as their applications in agriculture as eco-friendly pesticides and weed control agents. Naturally occurring coumarins have shown biological and allelopathic potential on a broad range of organisms. Coumarin inhibits seed germination, root growth, morphology, histology, water uptake, respiration, photosynthesis, cell elongation, cell división and differentiation. Coumarin demonstrate excellent insecticidal potential against eggs, larvae and adult insects. Coumarin showed antifeedent responses in a wide range of memebers from invertebrates to vertebrates. The information provided in this review...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Coumarin; Secondary metabolites; Multifunctionality; Herbivory; Allelopathy; Phytotoxicity; Weed control.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100220
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Agronomic Performance of Intacta RR2 Soybean Submitted to Doses of Glyphosate Planta Daninha
CESCO,V.J.S.; KRENCHINSKI,F.H.; RODRIGUES,D.M.; NARDI,R.; ALBRECHT,A.J.P.; ALBRECHT,L.P..
ABSTRACT: This study aimed at evaluating the agronomic performance of Intacta RR2 soybean submitted to the application of glyphosate doses in post-emergence. For this, two experiments were conducted in two locations (Palotina and Marechal Cândido Rondon - Paraná state). Applications were carried out with increasing rates of glyphosate (0, 720, 1,440, 2,160, 2,880, 3,600, 4,320 g a.e. ha-1), constituting seven treatments with an experimental design in randomized blocks with four replications, totaling 28 plots for each location. The cultivar used for both experiments was Monsoy 6210 Intacta RR2 IPROTM. The analyzed variables were phytotoxicity at 3, 7, 14, 21 and 28 DAA, A-B and total chlorophyll index, final height, number of pods, 100-seed weight, and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Glycine max; Yield; Phytotoxicity; Herbicides; Transgenic soybean.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100306
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Allelopathic effects of Sonchus oleraceus L. on the germination and seedling growth of crop and weed species Acta Botanica
Gomaa,Nasr Hassan; Hassan,Mahmoud Omar; Fahmy,Gamal Mohammad; González,Luís; Hammouda,Ola; Atteya,Atteya Mostafa.
We assessed the allelopathic effects of the aqueous extract of Sonchus oleraceus dry shoots on the germination and seedling growth of Trifolium alexandrinum, three weed species (Brassica nigra, Chenopodium murale and Melilotus indicus) and S. oleraceus itself. We assayed four different concentrations of the aqueous extract (w v-1): 1%, 2%, 3% and 4%. To determine whether the effects of the extract were attributable to the presence of allelopathic compounds, its osmotic potential or both, we prepared concentrations of polyethylene glycol (PEG) with osmotic potentials equivalent to those of the aqueous extract. All concentrations of the plant extract completely inhibited the germination and seedling growth of C. murale. The lowest concentration of the plant...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Allelochemicals; Aqueous extract; Bioherbicide; Phytotoxicity.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062014000300014
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ALLELOPATHIC POTENTIAL OF Serjania lethalis: EVIDENCE FROM Sesamum indicum Acta biol.Colomb.
De Cassia PEREIRA,Viviane; ANESE,Simoni; IMATOMI,Maristela; Umeda GRISI,Patrícia; MONTE CANEDO,Enzo; JULIANO GUALTIERI,Sonia Cristina; RODRIGUES-FILHO,Edson.
This study was designed to test the effect of different fractions of ethanolic extracts of young (y) and mature (m) leaves of Serjania lethalis A. St- Hil (Sapindaceae) on sesame (Sesamum indicum L.) seedling growth and metaxylem cells. Crude ethanolic extracts were prepared from the powder of young and mature S. lethalis leaves and fractionated by means of column chromatography. For the seedling growth bioassay, sesame seeds germinated at concentrations of 0.8, 0.4 and 0.2 mg mL-1 were used. After seven days, the lengths of the aerial part and of the primary root were measured. The sesame metaxylem cell growth bioassay was performed with seedlings grown in solutions containing the different fractions in the same concentrations as above. The tested...
Tipo: Journal article Palavras-chave: Cerrado; Phytotoxicity; Sapindaceae; Sesame; Xylem development.
Ano: 2015 URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2015000100004
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Allelopathic research in Brazil Acta Botanica
Reigosa,Manuel; Gomes,Anabele Stefânia; Ferreira,Alfredo Gui; Borghetti,Fabian.
In this article, we review allelopathy studies conducted in Brazil or involving plant species that occur in the country. Conceptions and misconceptions associated with allelopathy, as well as some international criteria to be applied in allelopathic research, are presented and discussed. We observed a sharp increase in the number of papers on this subject conducted in Brazil between 1991 and 2010. However, most studies are conducted under laboratory conditions, lack a clear hypothesis or a solid justification, and typically make use of target species that do not co-exist with the donor species under natural conditions. We also found that most studies do not take the additional steps in order to purify and identify the bioactive molecules. We recommend that...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Allelopathy; Allelochemicals; Competition; Interference; Phytotoxicity; Weed control.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062013000400001
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Alternative control of Tetranychus evansi Baker & Pritchard (Acari: Tetranychidae) on tomato plants grown in greenhouses Neotropical Entomology
Soto,Alberto; Venzon,Madelaine; Oliveira,Rafael M; Oliveira,Hamilton G; Pallini,Angelo.
Tetranychus evansi Baker & Pritchard is an important pest of solanaceous plants, including tomatoes. This mite is characterized by a high reproductive rate, which leads to high population growth in a short period of time causing important economic damage. Control of T. evansi is mainly through synthetic acaricides. In searching for environmentally friendly control measures, we evaluated the efficiency of alternative products to control T. evansi on tomato plants under greenhouse conditions. The products tested were lime sulphur and neem based products. We first estimated the lethal concentration (LC) and instantaneous rate of increase (r i) of T. evansi exposed to different product concentrations in laboratory conditions, and later tested the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Acari; Azadirachta indica; Lime sulphur; Efficiency; Phytotoxicity.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2010000400027
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Aluminum species and activity in sandy soil solution with pig slurry addition PAB
Conti,Lessandro De; Ceretta,Carlos Alberto; Couto,Rafael da Rosa; Ferreira,Paulo Ademar Avelar; Silva,Lincon Oliveira Stefanello da; Piccin,Rogério; Lourenzi,Cledimar Rogério; Girotto,Eduardo; Brunetto,Gustavo.
Abstract: The objective of this work was to evaluate the effect of pig slurry applications on the exchangeable Al content, activity, and distribution of Al chemical species in the soil solution. Soil samples of a Typic Hapludalf were obtained from an experiment conducted during eight years, with 19 applications of 0, 20, 40, and 80 m3 ha-1 pig slurry. The soil samples were collected in stratified layers to determine exchangeable Al content and to extract the soil solution by the saturated soil paste method. The concentrations of the main cations and anions, dissolved organic carbon, and pH in the soil solution were determined. The distribution of the chemical species of Al and the activity of the Al3+ species were obtained through the Visual Minteq...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Inorganic ligand; Organic amendment; Phytotoxicity; Soil solution.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017001000914
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Associations Between Herbicides and Glyphosate in Agronomic Performance of RR2 Intact Soybean Planta Daninha
CESCO,V.J.S.; ALBRECHT,A.J.P.; RODRIGUES,D.M.; KRENCHINSKI,F.H.; ALBRECHT,L.P..
ABSTRACT: The Roundup Ready (RR) soybean was developed for weed control with the use of glyphosate. Some herbicide combinations with glyphosate has been used in weed control and some effects of this practice may be undesirable in the agronomic performance of RR soybean. The present study evaluated the agronomic performance of RR2 intact soybean applied with associations between herbicides and glyphosate at post-emergence, in two experiments conducted in two municipalities in the state of Paraná, Palotina and Marechal Cândido Rondon. This experiment consisted of seven treatments in a randomized block design with four replications, totaling 28 plots for each municipality. The cultivar used in both experiments was Monsoy 6210 Intact RR2 IPROTM. The variables...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Glycine max; Susceptibility; Selectivity; Phytotoxicity.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100212
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Behavior of Eucalyptus grandis and E. cloeziana seedlings grown in arsenic-contaminated soil Rev. Bras. Ciênc. Solo
Melo,Roseli Freire; Dias,Luiz Eduardo; Mello,Jaime Wilson Vargas de; Oliveira,Juraci Alves.
Arsenic has been considered the most poisonous inorganic soil pollutant to living creatures. For this reason, the interest in phytoremediation species has been increasing in the last years. Particularly for the State of Minas Gerais, where areas of former mining activities are prone to the occurrence of acid drainage, the demand is great for suitable species to be used in the revegetation and "cleaning" of As-polluted areas. This study was carried out to evaluate the potential of seedlings of Eucalyptus grandis (Hill) Maiden and E. cloeziana F. Muell, for phytoremediation of As-polluted soils. Soil samples were incubated for a period of 15 days with different As (Na2HAsO4) doses (0, 50, 100, 200, and 400 mg dm-3). After 30 days of exposure the basal leaves...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Phytoremediation; Arsenate; Phytotoxicity.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832010000300040
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Behavior of Eucalyptus urophylla and Eucalyptus citriodora seedlings grown in soil contaminated by arsenate. Repositório Alice
MELO, R. F. de; DIAS, L. E.; ASSIS, I. R. de.
Persistent areas of tailings and deposits from coal and gold mining may present high levels of arsenic (As), mainly in the arsenate form, endangering the environment and human health. The establishment of vegetation cover is a key step to reclaiming these environments. Thus, this study aimed to evaluate the potential of Eucalyptus urophylla and E. citriodora seedlings for use in phytoremediation programs of arsenate-contaminated areas. Soil samples were incubated at increasing rates (0, 50, 100, 200 and 400 mg dm-3) of arsenic (arsenate form, using Na 2HAsO4) for 15 days. The seedlings were produced in a substrate (vermiculite + sawdust) and were transplanted to the pots with soil three months after seed germination. The values of plant height and diameter...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Raiz; Arsênio; Contaminação do solo; Eucalyptus urophylla; Eucalyptus citriodora; Semente; Muda; Cobertura vegetal; Recuperação do solo; Solo; Eucalyptus; Brotação; Germinação; Phytoremediation; Phytotoxicity; Revegetation.
Ano: 2016 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1064078
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Behavior of Eucalyptus urophylla and Eucalyptus citriodora Seedlings Grown in Soil Contaminated by Arsenate Rev. Bras. Ciênc. Solo
Melo,Roseli Freire; Dias,Luiz Eduardo; Assis,Igor Rodrigues de.
ABSTRACT Persistent areas of tailings and deposits from coal and gold mining may present high levels of arsenic (As), mainly in the arsenate form, endangering the environment and human health. The establishment of vegetation cover is a key step to reclaiming these environments. Thus, this study aimed to evaluate the potential of Eucalyptus urophylla and E. citriodora seedlings for use in phytoremediation programs of arsenate-contaminated areas. Soil samples were incubated at increasing rates (0, 50, 100, 200 and 400 mg dm-3) of arsenic (arsenate form, using Na2HAsO4) for 15 days. The seedlings were produced in a substrate (vermiculite + sawdust) and were transplanted to the pots with soil three months after seed germination. The values of plant height and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Phytoremediation; Phytotoxicity; Revegetation.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100516
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Behavior of RR soybeans subjected to different formulations and rates of glyphosate in the reproductive period Planta Daninha
Albrecht,A.J.P.; Albrecht,L.P.; Krenchinski,F.H.; Placido,H.F.; Lorenzetti,J.B.; Victoria Filho,R.; Barroso,A.A.M..
Recent studies indicate that glyphosate applied in post-emergence in RR soybean can eventually cause phytotoxic effects. However, there are many questions that need to be clarified in the scientific and technical contexts, involving the issue of RR soybeans regarding the use of glyphosate. This study has assessed the impact of the application of different doses and formulations of glyphosate in the reproductive period of RR soybean (R1 stage). For that purpose, an experiment in the field was conducted in two harvests (2011/12 and 2012/13), in which a 2 x 5 factorial design was used (formulations versus doses) totaling 10 treatments. In these two experiments the variables related to agronomic performance were: phytotoxicity (7, 14, 21 and 28 days after...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Glycine max; Herbicide; Transgenic crops; Phytotoxicity.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582014000400020
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BIOLOGICAL ACTIVITIES AND NOVEL APPLICATIONS OF CHALCONES Planta Daninha
DÍAZ-TIELAS,C.; GRAÑA,E.; REIGOSA,M.J.; SÁNCHEZ-MOREIRAS,A.M..
ABSTRACT This review provides information on the biological activities of chalcones (whether natural or synthetic derivatives) on different organisms, as well as an overview of the functions and possible new applications of these plant secondary metabolites on crop protection, as eco-friendly pesticides and weed control agents. Naturally occurring chalcones have been used in traditional medicine for many years; however, recent scientific advances have shown that these molecules have a broad range of biological activities in a variety of organisms. A review on the major sources of chalcones and the main molecular events involved in the modes of action of these natural products is achieved. Chalcones are molecules with a broad spectrum of biological...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Mode of action; Secondary metabolites; Crop protection; Pesticide; Fungicide; Antiviral; Phytotoxicity.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582016000300607
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Caracterização de clones de mandioca com e sem casca a serem utilizados na alimentação animal. Repositório Alice
SANTOS, L. F. dos; SOUZA, V. dos S.; OLIVEIRA, L. A. de; JESUS, J. L. de; SANTOS, V. da S.; BRITO, J. Á. G. de.
A mandioca (Manihot esculenta Crantz) é uma fonte de carboidrato, que é o componente quantitativamente mais importante das rações para diferentes espécies de animais. Assim, o presente trabalho teve como objetivo avaliar o teor de compostos ianogênicos, matéria seca, sólidos solúveis e relação amilose/amilopectina de três clones a serem utilizados na produção de farinha de raspa para alimentação animal.
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Sólidos solúveis; Mandioca; Nutrção animal; Composto cianogênico; Amilose; Matéria seca; Cassava; Amylase; Phytotoxicity; Dry matter content; Organic wastes.
Ano: 2014 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1011132
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Caracterização de híbridos de mandioca de mesa. Repositório Alice
OLIVEIRA, L. A. de; JESUS, J. L. de; SANTOS, J. F. dos; SANTOS, V. da S..
A cultura da mandioca (Manihot esculenta Crantz) é bastante disseminada pelo Brasil, sendo amplo o leque de'produtos derivados da mandioca de mesa ofertados no mercado. As raízes das variedades de mandioca destinadas à comercialização devem atender aos anseios do consumidor, demonstrando sabor característico e cozimento rápido. O
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Mandioca; Composto cianogênio; Fitotoxicidade; Cassava; Phytotoxicity.
Ano: 2014 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1000499
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Chemical Species and Aluminum Concentration in the Solution of Acid Soils Cultivated with Soybean and Corn under Liming Rev. Bras. Ciênc. Solo
Cunha,Gabriel Octávio de Mello; Almeida,Jaime Antonio de; Ernani,Paulo Roberto; Pereira,Éderson Rodrigues; Skoronski,Éverton; Lourenço,Lucas Silva; Brunetto,Gustavo.
ABSTRACT Chemical speciation of the soil solution is an important tool to identify Al species related to phytotoxicity. In some Brazilian acid soils, the Al extractable by the KCl 1.0 mol L -1 solution (Al-KCl) exceeds 10 cmol c kg -1 and even then, in some situations, it does not cause toxicity to the plants. This study aimed to evaluate the relationship between these high concentrations of Al-KCl found in some Brazilian acid soils and the activity of the different Al chemical species in the soil solution, as well as the response of soybean and corn plants to lime application. Subsurface horizon (B) samples of five soils were collected in four states of Brazil (AC, PE, RS, and SC) from areas that had never been cultivated. The samples were then given...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Chemical speciation; Phytotoxicity; Production of plants; Aluminum activity.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832018000100423
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Chlorination: phytotoxicity and effects on the production and quality of Lactuca sativa var. Mantecosa grown in a closed, soil-less system Phyton
Premuzic,Z; Palmucci,HE; Tamborenea,J; Nakama,M.
The addition of chlorine constitutes an economical disinfection method for closed, soil-less systems. Three quantities of sodium hypochlorite (0.55, 5.5 and 11 ppm) were applied to closed, soil-less greenhouse- grown lettuce (Lactuca sativa), to study the effect on its production (fresh weight and dry matter) and some commercial and nutritional quality factors (phytotoxicity, Vitamin C, nitrates). Sodium hypochlorite was weekly added within the nutrient solution, and the chemical properties (pH, EC and chlorides) of the recycled solution were measured. Damage to leaves was evaluated 15 days before harvest. Chlorination produced different effects regarding both production and quality. All treatments presented plants with excellent commercial weight,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Chlorination; Lactuca sativa; Nitrates; Phytotoxicity; Vitamin C.
Ano: 2007 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572007000100010
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Ecofriendly Synthesis of Silver Nanoparticles Using Potato Steroidal Alkaloids and Their Activity Against Phytopathogenic Fungi BABT
Almadiy,Abdulrhman A.; Nenaah,Gomah E..
ABSTRACT In order to reduce the excessive reliance on the toxic chemical fungicides, the present study aimed to isolate the total potato glycoalkaloids (TPAs), and the two steroidal alkaloids α-chaconine and α-solanine from potatoes, Solanum tuberosum L. Their structures were characterized using physical and spectroscopic methods including (UV, IR, 1H, 13C--NMR, 2D 1H-1H COSY, HMBC and NOESY). Silver nanoparticles (AgNPs) were prepared from potato alkaloids through a green synthesis approach. Potato alkaloids and their nanoparticles inhibited mycelial growth of the phytopathogenic fungi Alternaria alternate, Rhizoctonia solani, Botrytis cinerea and Fusarium oxysporum f. sp. lycopersici with low minimal inhibitory and minimal fungicidal concentrations. R....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Glycoalkaloids; Α-chaconine; Α-solanine nanoparticles; Fungicidal activity; Phytotoxicity.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132018000100203
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Ecotoxicology of Pig Slaughterhouse Waste Using Lactuca sativa L., Raphanus sativus L., and Oryza sativa L. Rev. Bras. Ciênc. Solo
Ramires,Maiara Figueiredo; Souza,Eduardo Lorensi de; Fontanive,Daniel Erison; Bianchetto,Renan; Krynski,Ângelo Munaretto; Cezimbra,Júlio Cesar Grasel; Antoniolli,Zaida Inês.
ABSTRACT Pork is the most consumed animal protein around the world. The production levels are significant, which results in the generation of large amounts of slaughter waste. Such waste is often disposed of improperly in agricultural areas, causing environmental imbalance by the contamination of soil and water sources with metals and pathogenic organisms. This study evaluates the phytotoxic effects of pig slaughterhouse waste in natura and after stabilization processes on lettuce (Lactuca sativa Linnaeus, 1753), radish (Raphanus sativus Linnaeus, 1753), and rice (Oryza sativa Linnaeus, 1753), in addition to shoot nutrient contents. To do this, the waste was evaluated through phytotoxicity tests on lettuce, radish, and rice plants in natura (PSWin) as well...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Pig farming; Phytotoxicity; Lettuce; Radish; Rice.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832019000100521
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Efeito de doses reduzidas de Glyphosate e Paraquat simulando deriva na cultura do milho. Repositório Alice
MAGALHAES, P. C.; SILVA, J.B.; DURAES, F. O. M.; KARAM, D.; RIBEIRO, L.S..
A aplicacao de herbicidas, seja para a dissecacao de culturas ou para o controle de plantas daninhas, vem crescendo, devido a expansao da fronteira agricola brasileira. Esse fato aumenta os riscos de ocorrencia de deriva acidental em culturas vizinhas suscetiveis. As perdas em produtividade sao desconhecidas em muitas situacoes de ocorrencia de deriva de herbicidas. O objetivo deste trabalho foi avaliar a possivel toxicidade causada pela deriva de doses reduzidas de dois herbicidas (glyphosate e paraquat) no periodo inicial de desenvolvimento da cultura do milho. foram utilizadas cinco doses simulando deriva - 2, 4, 6, 8 e 12% da dose recomendada (1.440 g ha-1 de glyphosate e 400 g ha-1 de paraquat) - sobre o cultivar de milho hibrido triplo BRS 3123. No...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Sorgo; Fitotoxicidade; Herbicidas; Dessecantes; Sorghum bicolor; Phytotoxicity; Herbicides; Desication.
Ano: 2001 URL: http://www.alice.cnptia.embrapa.br/handle/doc/485058
Registros recuperados: 94
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